Abruptly, over the riot of the falls, there was a piercing, hissing shriek. Echoes picked it up and sounded it again and again, all the way up the battlements of the cliffs. Honath sprang straight up in the air and came down trembling, facing away from the pool.
At first he could see nothing. Then, down at the open end of the turn, there was a huge flurry of motion.
A second later, a two-legged, blue-green reptile half as tall as the gorge itself came around the turn in a single bound and lunged violently into the far wall of the valley. It stopped as if momentarily stunned, and the great grinning head turned toward them a face of sinister and furious idiocy.
The shriek set the air to boiling again. Balancing itself with its heavy tail, the beast lowered its head and looked redly toward the falls.
The owner of the robbed nest had come home. They had met a demon of Hell at last.
Honath's mind at that instant went as white and blank as the under-bark of a poplar. He acted without thinking, without even knowing what he did. When thought began to creep back into his head again, the three of them were standing shivering in semidarkness, watching the blurred shadow of the demon lurching back and forth upon the screen of shining water.
It had been nothing but luck, not foreplanning, to find that there was a considerable space between the back of the falls proper and the blind wall of the canyon. It had been luck, too, which had forced Honath to skirt the pool in order to reach the falls at all, and thus had taken them all behind the silver curtain at the point where the weight of the falling water was too low to hammer them down for good. And it had been the blindest stroke of all that the demon had charged after them directly into the pool, where the deep, boiling water had slowed its thrashing hind legs enough to halt it before it went under the falls, as it had earlier blundered into the hard wall of the gorge.
Not an iota of all this had been in Honath's mind before he had discovered it to be true. At the moment that the huge reptile had screamed for the second time, he had simply grasped Mathild's hand and broken for the falls, leaping from low tree to shrub to fern faster than he had ever leapt before. He did not stop to see how well Mathild was keeping up with him, or whether or not Alaskon was following. He only ran. He might have screamed, too; he could not remember.